General Pump - Interpump


General Pump K5 Soft Unloader up to 10.8gpm 3000psi


General Pump / Interpump K5 / (ZK5 GP) flow activated unloader valve.

3000psi Maximum Rated Pressure

  • 3/8" Female Inlet / Male Outlet
  • 3/4" Male Bypass with 1/2" Female inner thread
  • 165°F max temperature

Models Available:

  • Z-K5.1 - 3.0 to 4.2gpm
  • Z-K5.2 - 4.2 to 6.6gpm
  • Z-K5.3 - 6.6 to 10.8gpm

Always choose the best match for your pump GPM. 


Unloader valves are one of the most important safety devices on a pressure washer system. Failure to install and set the unloader properly could result in a very dangerous situation causing severe damage to the pump and possibly the operator.

Professional installation is required.